Newbie, freshwater tropical aquarium queries

We have recently bought a Biorb flow 30l tank, cycled tank and introduced 2 Bala Sharks and 2 Angel Fish ( will upgrade size of tank as fish grow). The tank is running at a temp of 28 degrees Celsius, is this optimum temp for the fish?

 

Tank size requirements for those fish are not just because of there mature size(Bala sharks over a foot 70 gallon min.,Angels 6"or more30 gallon min.) but also to give them adequate space to swim. Your temperature is at the upper limit ideally you want to be around 80 degrees Farenheit. I am going to suggest you remove at least the sharks because even juveniles will not have enough swimming space in your tank. The angels will be O.K. but not for long.
It is always best for you and your animals that you research before purchasing and upgrade to larger fish after you have upgraded your tank. Not before.
Good luck.

 

We were under the impression, from our LFS, that this size of tank would be sufficient for the fish for at least 6 months. However, on your advice we will upgrade to a larger tank ASAP.

 

Yes, definitely should upgrade. If you want to keep that one running, put a betta, or even better (IMO) endlers! Just only get males if you want no fry- they breed like guppies ( closely related) good luck!

 

I agree with Vinny on this. Sorry to hear you were given bad info at your LFS.

 

I agree with the bala sharks, but I do think that as long as you monitor your fishes growth, you can keep younger fish in a slightly smaller tank than needed for full size. I understand the need for the large tank when they are fully grown ( it's cruel to keep them in too small of a tank) but not everyone can afford a large tank to start. If you keep track of your fishes growth with photos and such, you can successfully keep them in a smaller tank and move them to a bigger tank down the road without harming the fish. A dedicated aquarist can make do without hurting their little guys.